新增 logo、優化 AI 問答

app/competition/page.tsx

@@ -152,8 +152,12 @@ export default function CompetitionPage() {
                 返回主頁
               </Button>
               <div className="flex items-center space-x-2">
-                <div className="w-8 h-8 bg-gradient-to-r from-blue-600 to-purple-600 rounded-lg flex items-center justify-center">
-                  <Trophy className="w-5 h-5 text-white" />
+                <div className="h-8 rounded-lg flex items-center justify-center">
+                  <img 
+                    src="/logo.png" 
+                    alt="強茂集團 AI 展示平台" 
+                    className="h-8 object-contain"
+                  />
                 </div>
                 <div>
                   <h1 className="text-xl font-bold text-gray-900">競賽專區</h1>